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10 Cards in this Set
- Front
- Back
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elements
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a part or aspect of something abstract, especialy one that is essential or characteristic.
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atom
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the basic unit of a chemical element.
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nucleus |
the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
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protons
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a stable subatomic particle occurring in all atoic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
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neutrons
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a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
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electrons
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a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
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atomic number
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the number of protons in the nucleus of an atom.
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periodic table
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a table of the chemical elements arranged in order of atomic number
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atomic mass unit
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a unit of mass used to express atomic and molecular weights
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valence electrons
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a valence electron is an electron that is associated with an atom
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